the edelbrooks ovals are 290 cc with either 110 or 100 cc chambers.
with a 18cc dome,
there must be a formula to get static compression with chamber size..

I know with 118 chambera I'm at 10.2 in a perfect world..

and tech. what made you pick "that" afr head and not the other two ovals??
the g.m. ovals are like 312-317cc ports..
these afr "265"s arn't those close to peanut port size?? (try'd looking up the intake port size on p/p heads and came up empty)